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An efficient hardware-optimized Physical Random Access Channel (PRACH) baseband signal generation algorithm and its ASIC implementation in the LTE user equipment (UE) transmitter are presented in this paper. A simplified DFT of the Zadoff-Chu (ZC) sequence as well as a phase computation are applied to the prime size DFT of the PRACH preamble and the large(More)
In statistical signal processing, the sequential Monte Carlo (SMC) method is powerful and can approach the theoretical optima. However, its computational complexity is usually very high, especially in multiple-input multiple-output (MIMO) systems. This paper presents a new low-complexity SMC (LC-SMC) algorithm for blind detection in MIMO systems, the main(More)
Time and frequency synchronization is very critical in LTE downlink. This paper proposed a joint time and frequency synchronization algorithm to estimate the carrier frequency offset (CFO), including the integer frequency offset (IFO) and the fractional frequency offset (FFO), and the start position of a radio frame. The FFO is first estimated by maximum(More)
This paper presents an ASP (application specific processor) with 512-bit SIMD (Single Instruction Multiple Data) and 192-bit VLIW (Very Long Instruction Word) architecture optimized for wireless baseband processing. It employs optimized architecture and address generation unit to accelerate the kernel algorithms. Based on the ASP, a multi-core baseband(More)
A successive interference cancellation (SIC) algorithm based on breadth-first search (BFS) is developed to achieve a soft-input soft-output detector via the tree structure of the MIMO system model in this paper. Instead of visiting all nodes of the tree, the proposed BFS-SIC algorithm only browses and extends those paths with large metrics. If paths are(More)
For code division multiple access (CDMA) systems operating over dispersive channels, the nested recursive least-squares (RLS)-type algorithm, based on minimum output energy (MOE) criterion, attracts much attention as an efficient interference suppression scheme for its simple adaptive recursion. In this letter, we investigate its performance analysis.(More)
—In this paper, we present a sparse channel estimation method for orthogonal frequency division multiplexing (OFDM) based two-way relay networks (TWRN). Conventional channel estimation methods, such as least squares (LS), have been proposed to obtain channel state information (CSI) at the cost of the training resource, which reduce spectrum efficiency.(More)
Processor architects usually design uniprocessor or chip multiprocessor (CMP) by using a platform-based approach. One of the major challenges in this approach is to explore the exponential-size design space composed of many tunable and interacting architectural parameters. An exhaustive search of the design space is prohibitive because of the expensive(More)